Bantams....What are the Genetics?

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Rootball

Rootball

Songster
10 Years
May 17, 2009
560
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Western Colorado
I guess Ive always wondered this, and something today reminded me, but what is the gene or genes for bantams and how does it work?

Some breeds have bantams some dont, some don't have Large Fowl. They cant just be bred down or there would a multitude of sizes.

What causes Bantams?


What are the genetics of dominance? If bred to large fowl what size are the offspring?

I have no experience with bantams.
 
When bred to a Large Fowl bird the offspring are an in between size of the parents. About a medium size.

And I'd think you would HAVE to breed down by selecting the smallest. The rest would be culls.
 
There are at least four separate dwarfing/bantam genes. Different breeds of bantams carry different ones. I think three are recessive and one is dominant. I'll look it up to verify.
 
Thanks for the Quick replies peeps.


SS let me know where you look it up. I am realizing that most of my resources deal primarily with color.
 
Happy to find this topic & just when I thought that I was the only one curious about it. It"s a small world after all! My favorite bantam is the Bantam Salmon Faverolles (blues & normals) & have been slowly building a flock this year; wish me luck, they're hard to find.

QUESTIONS: How were the bantam varieties developed? Was each chicken breed crossed with a smaller type chicken or were selective smaller ones crossed over & over until the miniature size was consistant in all offspring? Are there ever any bantam offspring that come out standard sized? How did this bantam thing all happen?
 
Quote:
That doesn't apply to the sexlinked genes.
Bantam rooster could throw bantam size pullets from a big girl.
Large fowl rooster could throw big pullets from a bantam hen.

There is fine tuning though.
 
Quote:
That doesn't apply to the sexlinked genes.
Bantam rooster could throw bantam size pullets from a big girl.
Large fowl rooster could throw big pullets from a bantam hen.

There is fine tuning though.

Interesting..

So, I have a question then. I haven't gotten all of the loci stuff understood yet and that article barely made sense. I have a mix chick hatched from my Sebright roo and (most likely) my Australorp hen. Hatched out of a large brown egg, four toes, pink skin, and has a rose comb. What size would I expect it to be? I weighed all four of my mixed chicks and this one was the third heaviest chick (about 2.4 oz).
 
Locus (pl loci) is the position on the chormosome for a particular set of alleles. If loci for two or more sets of alleles are close on the same chromosome there will be what is called linkage & the genes from the same parent will be more likely to be inherited together.
 

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